#include "ex5stack.h"
Stack::Stack() {
  // creat an empty stack
  top = 0;
}

bool Stack::isempty() const {
  return top == 0;
}

bool Stack::isfull() const {
  return top == MAX;
}

bool Stack::push(const Item & item) {
  if (top < MAX) {
    items[top++] = item;
    return true;
  } else
    return false;
}

bool Stack::pop(Item & item){
  if (top > 0) {
    item = items[--top];
    return true;
  } else 
    return false;
}
